A population consist of multiple of five numbers where is 5, 10, 15, 20, 25, and 30 with sample size of 2. Find the population variance.
Question
A population consist of multiple of five numbers where is 5, 10, 15, 20, 25, and 30 with sample size of 2. Find the population variance.
Solution
To calculate the population variance, follow these steps:
-
Calculate the mean (average) of the population. Add all the numbers together and divide by the number of numbers.
(5 + 10 + 15 + 20 + 25 + 30) / 6 = 17.5
-
Subtract the mean from each number in the population and square the result. This is called the "squared difference".
(5 - 17.5)^2 = 156.25 (10 - 17.5)^2 = 56.25 (15 - 17.5)^2 = 6.25 (20 - 17.5)^2 = 6.25 (25 - 17.5)^2 = 56.25 (30 - 17.5)^2 = 156.25
-
Add all the squared differences together.
156.25 + 56.25 + 6.25 + 6.25 + 56.25 + 156.25 = 437.5
-
Divide the sum of the squared differences by the number of numbers in the population to get the variance.
437.5 / 6 = 72.92
So, the population variance is 72.92.
Similar Questions
A population consist of multiple of five numbers where is 5, 10, 15, 20, 25, and 30 with sample size of 2. Find the population mean.
A population consist of multiple of five numbers where is 5, 10, 15, 20, 25, and 30 with sample size of 2. What is the number of possible samples?
What is the variance of a random sample of size 5 that is taken with replacement from a population with mean = 15 and variance = 10?
A data set contains the following values: 11, 3, 5, 18, 1, 4, 7. Find the population variance. Round your answer to 4 decimal places.
Variance and Coefficient of Variation:Using the same data set: 5,8,12,14,18,20,22,255,8,12,14,18,20,22,25,Calculate the variance.Determine the coefficient of variation.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.